I tried to make my own mix of bootcds (as I always do and worked fine), by extracting the image contents (luckily I have no folder conflicts), extracting the boot code and using easyboot to make a new image, and UBCD4 now gives me something like this:

"isolinux: image checksum error, sorry..."

Is there a way to trick the system to boot? (somehow ignore different checksum or something)

Thanks in advance.

Also, how come and UBCD4 is so much smaller than UBCD3.4? Was the overhead so different?

If I remember well, Insert has been removed starting from version 4. That may explain the big size difference.

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I tried to make my own mix of bootcds (as I always do and worked fine), by extracting the image contents (luckily I have no folder conflicts), extracting the boot code and using easyboot to make a new image, and UBCD4 now gives me something like this:

"isolinux: image checksum error, sorry..."

Is there a way to trick the system to boot? (somehow ignore different checksum or something)

Thanks in advance.

Also, how come and UBCD4 is so much smaller than UBCD3.4? Was the overhead so different?

I found the total size of the image much smaller. Probably because of INSERT.

Or you mean about the checksum error?

I have a triple boot CD, where all three "original" CD folders are dropped on the new CD (luckily there is no real folder conflict) and extracted the original boot codes (easyboot can use those). It worked fine with UBCD 3.4, but now with 4.0, when I choose to load UBCD 4.0 (the other two of the mix work fine) I get this checksum error...

I don't know what it checks for checksum, but I suspect what it checks has CORRECTLY a different checksum, so I would prefer to disable this check.

I found the total size of the image much smaller. Probably because of INSERT.

Or you mean about the checksum error?

I have a triple boot CD, where all three "original" CD folders are dropped on the new CD (luckily there is no real folder conflict) and extracted the original boot codes (easyboot can use those). It worked fine with UBCD 3.4, but now with 4.0, when I choose to load UBCD 4.0 (the other two of the mix work fine) I get this checksum error...

I don't know what it checks for checksum, but I suspect what it checks has CORRECTLY a different checksum, so I would prefer to disable this check.

Forget about INSERT. I was referring to when does the checksum error occur. During inital boot or when you go into another menu. I'm not sure I understand what if any thing you did with the orignal version 4 cd.

I have made a boot CD by mixing 3 other boot CD (MiniPE-XT, Hiren's and UBCD). This method involves extracting the contents of the 3 boot CD, luckily there is no folder conflict, and extracting the boot code from the original 3 boot CD, then "call" this boot code from inside the custom EasyBoot menu.

This worked fine with UBCD 3.4, but not with 4.0.

How does UBCD calculate the checksum? If it looks for the checksum of a specific CD portion it is obvious that this will produce an error (we have a new CD in my case, not the same image).

Did you use any of the tools I mentioned?
Did you compile using MKISOFS? Trt that one.
I keep getting the error with cdimage and traced down
someone else having checksum error with mkisofs with missing options.
Ultraiso also works okay.

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